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low protein evolutionary advantage?

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  • low protein evolutionary advantage?

    Can someone explain this to me... study i found

    The ®rst issue to be considered is why the same
    individual can apparently dispose of a considerable
    excess of energy when the diet is low in protein, but to
    a much lesser extent when the dietary protein level is
    adequate? Bearing in mind the demonstrations of the
    potent stimulatory effect of protein de®ciency on
    thermogenesis (thereby underlying the low ef®ciency
    of growth) in many species including laboratory
    rodents, pigs, monkeys and human infants,12 ± 15 and
    that other nutrient de®ciencesÐfor example in vitamin
    A, copper, iron and potassiumÐalso result in
    low ef®ciency of growth and increased thermogenesis,
    16 the teleological argument can be put forward
    that a high capacity to activate DIT has emerged
    during the course of evolution as an adaptation to
    nutrient-de®cient diets. As argued by Stock,11 the
    necessity to increase DIT in the face of nutrientde
    ®cient diets probably had survival advantage
    during the course of mammalian evolution since it
    enables the overeating (on an energy basis) of such
    nutrient-de®cient diets in an attempt to achieve an
    adequate intake of the speci®c nutrient, but without
    the disadvantage of excessive fat accumulationÐa
    hindrance to optimal locomotion, hunting capabilities,
    and the ability to ®ght or ¯ight. Viewed in terms of
    survival value, it is therefore not surprising that
    protein de®ciency is a most potent dietary stimulus
    of thermogenesis, and Miller, who was very much
    aware of this following earlier studies on protein :
    energy requirements for maintenance,17 therefore
    selected a low-protein diet in order to test the ability
    of humans to resist weight gain during overfeeding.5,6
    Get on my Level